Generalized Benney Lattice and the Heavenly Equation

Details Generalized Benney Lattice and the Heavenly Equation Generalized Benney Lattice and the Heavenly Equation

2002-04-22

arxiv.org/abs/nlin/0204053v1

Nonlinear Sciences

Exactly Solvable and Integrable Systems

10 pages

Scientific paper

We generalize the Benney lattice and show that the new system of equations can be reduced to a generalized Chaplygin gas as well as the heavenly equation. We construct two infinite sets of conserved charges and show that one of the sets can be obtained from the Lax function. The conserved densities are related to Legendre polynomials and we present closed form expressions for the generating functions for these densities which also determines the Riemann invariants of the problem. We prove that the system is bi-Hamiltonian and that the conserved charges are in involution with respect to either of the Hamiltonian structures. We show that the associated generalized elastic medium equations are bi-Hamiltonian as well. We also bring out various other interesting features of our model.

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